This is usually caused by the SD card, and is nothing to do with the camera. On the SD card there is a small slider - which allows you to lock the card (to prevent accidental erasure).

If you put in on the table with contacts upwards, corner cut top left, then the slider is on the right hand edge, about 1/3 the way down. If it is slid to the top position (nearest the contacts) the card is unlocked. If it is slid down (away from the contacts) the card is locked.

If it is a damaged / "cheap" card, sometimes the slider falls out, in which case the card is locked. You can still read from it, but not write to it until fixed or replaced.

First check is to turn the camera off, remove the card, move the slider to locked, then back to unlocked. Replace in the camera and turn on.

Sorry about that, but i do not know the type
if it's an sd card , you should have this button
but is seems it's not ; that could be in your
cam menu / i hope that will help
or its in your user guide manual